At the Okinawa training camp, Yukimura and Himuro shared a kiss of the highest theoretical value on a bridge of the greatest mood value under the beautiful, painterly rays of the morning sun. But the amount of saliva they collected was insufficient and so retesting is required. They head to the biological sciences' Regulation of Biological Systems Department to meet with a specialist in saliva testing. There, they find an alluring woman dressed like a traditional courtesan wearing a lab coat, Suiu, and her sweetheart, Chris. When Yukimura asks Suiu and Chris to help with their experiment to "give proof of love," Chris and Suiu flaunt their overwhelming aura of love.
to find the definition of "love,"
،"من أجل إيجاد تعريف للـ"حبّ
müssen wir die Liebe definieren.
para determinar si nos amamos y 
encontrar la definición del amor.
para determinar si nos amamos
y definir del amor.
si Himuro et moi sommes amoureux,
ainsi que la définition de l’amour !
per trovare la definizione di "amore",
para que possamos concluir se
gostamos um do outro, e definir o amor.
чтобы дать определение «любви»,